WPBF 25 News has learned the name of the drug paramedics administered to the man.

Cellphone video shot by a witness showed Tavares Docher, 29, lying in a pool of his own blood while being restrained by three deputies in a CVS parking lot. He was yelling, "They’re going to kill me."

Deputies said Docher appeared to be drunk and was causing a disturbance at the CVS. They said he attempted to flee after he was put in handcuffs.

When paramedics arrived at the scene, they injected Docher with an undisclosed drug to sedate him. Fire officials refused to say what that drug was because of patient privacy laws.

WPBF 25 News has learned the sedative was 4 milligrams of Ativan, a drug commonly used to relax combative patients.

After Docher was given the drug, paramedics noticed Docher was no longer breathing, according to medical records.

Rescuers performed CPR and had to shock Docher's heart back to beating in the ambulance, but he hasn’t awakened since the incident.

Dr. Scott McFarland, a medical director who oversees Riviera Beach and North Palm Beach paramedics, told WPBF 25 News that physically restraining a man after injecting him with Ativan can be a deadly combination. Squeezing someone’s diaphragm by restraining him coupled with a drug that suppresses a body’s instinct to breathe can result in loss of oxygen to the brain, according to McFarland.

Docher’s mother said she waits by her son’s side every day in the hospital, hoping he’ll wake up, but his prognosis is not looking good, and doctors told her there has been little to no sign of brain activity.

“Just to see his body so limber, as a mother, that's painful,” Janice Docher said. “Words can't describe right now how I feel.”

Docher’s family has said he suffers from mental issues and acts like a child in a man’s body.

While deputies said Docher appeared intoxicated, medical records showed he had traces of marijuana and a negligible amount of alcohol in his system.